Contact-post



(N0 Model.)

R. SEGERDAHL. CONTACT POST.

No. 540,367. Patented Juil@ 4, 1895.

@Mmm

RUDOLPH SEGERDAHL,

anion.

OF CHICAGO, ILLINOIS;

CONTACT-POST.

SPECIFICATION forming part of Letters latent No. 540,36*?, dated June 4, 1895.

Application le'd March 29, 1 8 94.

.To @ZZ whom t may concern:

Beit known that I, RUDOLPH SEGERDAHL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Contact- Postor Circuit-Breaker, of which the following is a specification.

My invention relates to improvements in a circuit-breaker or contact-post, of the class generally used in electric bells, 0r other apparatus where an adjustable contact constitutes part of its circuit; and the objects of my improvements are, first, to afford facilities whereby to maintain a perfect electrical connection between the circuit wire and the movable contact; second, to provide a clamping device for the movable contact that permits of adjusting thesame without disarranging the electrical connection between said adjustable contact and the circuit wire, and third, to obtain a cheap, simple and durable structure. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a plane elevation of a bell embodying my improvements; Fig. 2, a side view of the contact-post disconnected from the bell; Fig. 3, a top view of the mechanism, and Fig. 4 a cross-section of the complete mechanism and of the base-plate into which it is held.

Similar letters refer to similar parts throu ghout the several views.

In Fig. 4, -a is a standard or post, made hollow to receive the eye-bolt --b-a, and I prefer to make the same out of hard rubber or any other suitable non-conductor, as it permits of securing it in the base-plate or support -f in a simple manner; it being preferably held by means of being fitted closely and then driven into a hole provided in the base-plate -fas shown in Fig. 4:.

The eye-bolt -bis made of metal and fitted loosely in the hollow of the standard a so as to be readily operatedby the clampingnut -cat its upper end; so that when the contact -dwhich is arranged to pass through said eye bolt and the standard cz-- preferably by means of being threaded into serai No. 605,648. on model.)

the same can after it hasreceived its proper adjustment be securely locked by the clamping-nut --c-, which when operated is intended to act ou the eye-bolt b in such a manner as to increase the friction of the contact same required in adjusting it properly, does not release the clam-pin g device or disturb the electrical connection between the same and the circuit terminal.

What I consider as new, and desire to secure by Letters Patent, is

1. In a contact-post or circuit-breaker, a hollow standard made from a non-conductive material, an adjustable contact passing through the walls of the same, and a connector which forms a part of an electric circuit arranged toengage with said contact, whereby the same may be introduced in and maintained as a part of said circuit, substantially as and for the purpose specified.

2. The combination, in a contact-post or circuit-breaker, with a hollow-standard, and an adjustable contact passing through the walls of the same, of an eye-bolt or similar device arranged to engage with said contact, and means to operate the same as described,

whereby a clamping device may be attained adapted t0 secure said contact also to permit its proper adjustments to be made Without disturbing the said clamping device.

3. The combination, in an electric circuit, of a hollow standard and a conductor passing through the walls of the same, with a metallic connector arranged in the standard to engage with said conductor, and a clamping device adapted to secure an electrical connection between the same and said conductor, substantially as and for the purpose described.

RUDOLPH SEGERDAHL.

Witnesses:

JOHN SHILLEsTAD, Cassius M. C. Cnoss. 

